Toko Kisaragi is a new female detective who was transferred to 11 Section of the 1st Investigation Division at the Tokyo Metropolitan Police Department as she wishes. Her father was a former detective of the same police department. On March 9, a murder case was reported and the victim's body was found cemented. The next morning, the killer brazenly calls the police department and he identifies himself as Toremi. Toko Kisaragi becomes Toremi's negotiator. The murderer continues to shake the investigation headquarters, calling the investigation headquarters frequently and presenting information about his murder. Toremi leads the police to the second victim. There, the police discovered the victim's body cemented. (Source: Wikipedia, AsianWiki) ~~ Adapted from the novel "Ishi no Mayu Keishicho Satsujin Bunsekihan" by Kazushi Asami.